Baking pan



T. M. HIESTER May 2, 1933.

BAKING PAN Filed July 10 1931 F'lenl.

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INVENTOR THEODORE M- HIESTER,

ATTORNEYS Patented May 2, 1933 UNITED STATES.

rnnonon n. msrnn, .ornarron, omo, ASSIGNOR 'ro um'rnn Atacama rnonoc'rs,

PATENTOFFICE" me, or DAYTON, 0310, a conrona'rion or OHIO BAKING PANApplication med J'uly 1o, 1931. Seriall'o. 549,858.

My invention relates to a new article of manufacture for use as a bakingpan. g It is the object of-my invention to provide a baking pan havingan, annular depression 5 with taperingside walls and a centralprojection in the depression. I y 1 In articular, it is my-object toprovide a panhaving an, annular depression in which the bottom of thedepression the wall at the topsurroundingthe depression and the topportion of the extruded portion'in the center of the depressionwillbethe same thickness while the side walls of the depression will bethinner. T A 1 It is a further object'to provide such a pan out ofan'integralsheet of metal without soldering, folds, interlockinfg parts,or other ineans of attachment 0 separable pieces. y, Referring to thedrawingi Figure 1 is a topplan view of the inside of the an; .I Flgure 2is a rear-elevation or plan view of the bottom-of the pan; v Figure 3 is.a' sectionon thllne 33 of Fi rel. 1 fiferring to, therdrawing indetail, this an is formed from; asin'gle-sheet .of metal esignated 1.The metal isof uniform thickness prior to being formed, Such thicknessis indicatedas n2. 7 I extrude jand'rollthe outside side wall 3 and theinside side wall 4 leavin the bottom 5 untouched. Asa result oft'isiaction I have relatively thin side walls 3 and?! which are aboutthinner than ,the original metal thickness indicated at 2 and at 5. Ilikewise leave the center. top member 6 of the same thiclme'ss. v

In the courseof manufacturing I form a depression in the plate 1 havinga bottom 5 and 6 and side walls 3 and then reverse the action and formthe side wall 4 moving the portionnfiof the -bottom back to, 4 itsoriginal plane.

The advantage of such a pan is that heretofore the heat beingapplieddirectly as on a stove to the bottoms 5 and the side walls 3 and 4, inthe piror art pans being of the same thickness as the bottom 5 thatportion of the product in the pan would be over cooked at 5 as comparedwith the portions ad'acent the side walls 3 and 4' which are only eatedby indirect heat by the air above the stove top.

By providing thinner side walls 3 and 4 I am enabled to secure uniformbaking as the loss in radiated heat, due to the transmis sion of theheat through the air from the tion that has an inside wall an an outsidewall, as it is diflicult to so bake a productof that characteruniformly.

Heretofore in the art, not only were ans of uniform thickness, but theywere su ject to the very serious objection that the annular portionswere attached by solderin by swaging, or by interlocking in some orm,.

and in use, due to theexpansion and contraction (if metals and the veryrough usage to which such pans are subjected, particularly in commercialbakeries, the parts became, loosened, were difficult to clean becausethe" fmaterial would get the cracks, and difii cult to maintain solderedor swaged due to the excessive heat to which the pans are.

subjected during baking. 7

-: It will be understood that I desire to comp'rehend within myinvention such modifica tioLns as may be necessary to adapt it tovarying conditions and uses.

Havin thus fully described my invention what I c aim as new and desireto secure by LettersPatent,

new articleofmanufacture, comprlsing a baking pan made from a singlesheet of metal provided interiorly of its outer margin with a pluralityof annular depressions each comprising inner and outer tapered 5 walls,a bottom, and a to member, the latter lying in substantially tiie sameplane with the original sheet, said bottom and top members being ofsubstantially greater thickness than said side walls and all of saidparts being integral and presenting when completed a rigid structure inwhich the thin side walls of the depressions are reinforced andstrengthened by the relatively heavier metal in the bottom and topportions of the pan. In testimony whereof, I aflix my signature.

THEODORE M. HIESTER.

